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Hand Tap M10X1 LH DIN 2181/2 6H HSS
5662
€15.21 tax inc.
Net price: €12.37
Description
Technical data for the M10x1 left-hand hand tap
| Technical data | |
|---|---|
| Nominal diameter d1 mm | M10 |
| Thread pitch P mm | 1 mm |
| Overall length l1 | 63 mm |
| Flute length l2 | 18 mm |
| Shank diameter d2 | 7 mm |
| Square drive size a | 5.5 mm |
| Tap drill diameter | 9 mm |
| Thread angle G | 60° |
| Tap tolerance | ISO2 6H |
Roughing tap and finishing tap – how much material each removes
Division of work in the 1–2 set
The M10x1 LH thread is cut into the wall of a hole with a diameter of 9 mm. The thread groove extends 0.5 mm into the wall. A single tap would have to cut the entire groove at once — by hand, this means high resistance and a risk of breakage. The set divides this work into two passes.
The drawing shows the entire set in operation. Both taps have the same shank and the same length. They differ in their chamfer, the tapered tip: No. 1 has a chamfer spanning 8 threads, while No. 2 spans only 2 threads. The detail windows at the hole wall show how the thread groove deepens after each tap.
| Tap | Chamfer | Chamfer angle | Material removed | How it works in the hole |
|---|---|---|---|---|
| No. 1 – roughing tap | long, 8 threads | 5° | the main portion of the groove | enters smoothly and establishes thread alignment |
| No. 2 – finishing tap | short, 2 threads | 20° | the remainder, to the full profile | follows the cut threads and produces the full 6H profile |
How to distinguish the taps in the set
The chamfer on No. 1 is 4 times as long as the chamfer on No. 2 — the difference is immediately visible when you place them side by side. No. 1 has an incomplete thread profile; only No. 2 has the full profile. The number is also indicated on the shank: No. 1 has one ring, No. 2 has none. Keep the set together and always start with the roughing tap.
How to tap an M10x1 LH hole – sequence 1, 2
Hand tapping step by step
Thread M10x1 LH in four steps
ØDrilling
Drill bit 9 mm
1Roughing tap
Chamfer 8 threads
2Finishing tap
Chamfer 2 threads
✓Finished thread
Tolerance 6H
Turning sequence: half a turn counterclockwise, a quarter turn clockwise | Between taps: remove chips from the hole
Start with the hole. The drill diameter is easy to calculate: thread diameter 10 mm minus pitch 1 mm gives 9 mm. An undersized hole is a common cause of a tap twisting off in the workpiece.
Through hole or blind hole – how deep to drill
The set taps both types of holes. In a through hole, the thread extends through the full material thickness. In a blind hole, cut the thread to 25 mm, or 2.5 times the thread diameter (2.5 x 10 mm, shown as 2.5D in the drawing). Drill the hole deeper than the thread. The finishing tap has a chamfer spanning 2 threads, so approx. 2 incomplete threads remain near the bottom. The extra depth below the thread accommodates them along with the chips.
No. 1 – the roughing tap establishes thread alignment
Fit the roughing tap into a tap wrench and position it perpendicular to the surface. Check the angle from two sides, for example with a square. This is a left-hand thread, so turn in the opposite direction to usual: half a turn counterclockwise, then a quarter turn clockwise. Reversing breaks the chip into short pieces — a slight crunch is normal. The first threads determine whether the thread will be straight.
No. 2 – the finishing tap produces the full profile
Unscrew the roughing tap and remove chips from the hole. Screw the finishing tap by hand into the cut threads — it should engage them naturally. Continue with the same turning sequence as for the roughing tap. The finishing tap removes the remaining material and cuts the groove to its full profile within 6H tolerance. Once it screws smoothly all the way in, the thread is complete — check it with an M10x1 LH screw.
M10x1 left-hand metric fine hand taps
Hand tap M10x1 left-hand DIN 2181 6H HSS is used to produce left-hand metric threads with a pitch of 1.0 mm. The set contains two tools — a roughing tap and a finishing tap — allowing tapping to proceed in stages with full control. The tool meets DIN 2181 and thread tolerance class 6H requirements and can be used in both through holes and blind holes.
Set manufactured by Varel features robust construction, stable operation, and carefully finished cutting edges. High-speed steel (HSS) construction HSS provides abrasion resistance and longer service life when machining low-carbon steel, aluminum alloys, brass, and other readily machinable metals. A tap wrench fitted to the square drive is used for operation, facilitating guidance.
Key features:
- 2-piece set – roughing tap for initial cutting, finishing tap for producing the full profile.
- Manufacturer Varel – reliability, durability, and manufacturing accuracy.
- HSS high-speed steel – increased wear resistance and stable performance.
- Versatile applications – use in through holes and blind holes with a tap wrench fitted to the square drive.
Stages of cutting an M10x1 left-hand thread with a 2-piece set: roughing tap and finishing tap
Frequently asked questions
The LH designation indicates a left-hand thread. Cutting proceeds in the opposite direction to standard tapping, preventing self-loosening in specific applications.
First, use the roughing tap for initial guidance and cutting, followed by the finishing tap to produce the full thread profile.
Yes. The tool design and geometry allow tapping in through holes and blind holes in accordance with DIN 2181 and class 6H.
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| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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